TY - JOUR
T1 - Mathematical modeling of biologically mediated redox processes of iron and arsenic release in groundwater
AU - Razzak, Abdur
AU - Jinno, Kenji
AU - Hiroshiro, Yoshinari
AU - Halim, Md Abdul
AU - Oda, Keita
N1 - Funding Information:
Acknowledgments The authors express sincere gratitude to Japanese Society of Promotion Science for their financial support: Simulation and remediation model for the groundwater contaminated by arsenic and multi-geochemical species (No. 18-06396, 2006-2007). Ministry of Education, Culture, Sports, Science and Technology, Japan and Dhaka city corporation (DCC), Bangladesh are gratefully acknowledged for providing scholarship (Mombukagaku-sho) to the first author to carry out the research in Japan and allowing to conduct the research, respectively.
PY - 2009/7
Y1 - 2009/7
N2 - A one dimensional reactive transport model was developed in order to illustrate the biogeochemical behavior of arsenic and iron reduction and release to groundwater that accounts for the reaction coupling the major redox elements under reducing environment. Mass transport equation and the method of characteristics were used considering fundamental geochemical processes to simulate transport processes of different pollutants in mobile phase. The kinetic sub-model describes the heterotrophic metabolisms of several microorganisms. To model a complete redox sequence (aerobic or denitrifiers, Fe(III)-reduction, respiration bacteria of iron and arsenic compounds, and As(V) reduction) four functional bacterial groups (X1, X2, X3, and X4) were defined. Microbial growth was assumed to follow Monod type kinetics. The exchange between the different phases (mobile, bio, and matrix) was also considered in this approach. Results from a soil column experiment were used to verify the simulation results of the model. The model depicts the utilization of oxygen, nitrate, iron oxide and arsenic as electron acceptors for oxidation of organic carbon (OC) in a column. The OC as electron donor is one of the most important factors that affect the iron and arsenic reduction bacterial activity.
AB - A one dimensional reactive transport model was developed in order to illustrate the biogeochemical behavior of arsenic and iron reduction and release to groundwater that accounts for the reaction coupling the major redox elements under reducing environment. Mass transport equation and the method of characteristics were used considering fundamental geochemical processes to simulate transport processes of different pollutants in mobile phase. The kinetic sub-model describes the heterotrophic metabolisms of several microorganisms. To model a complete redox sequence (aerobic or denitrifiers, Fe(III)-reduction, respiration bacteria of iron and arsenic compounds, and As(V) reduction) four functional bacterial groups (X1, X2, X3, and X4) were defined. Microbial growth was assumed to follow Monod type kinetics. The exchange between the different phases (mobile, bio, and matrix) was also considered in this approach. Results from a soil column experiment were used to verify the simulation results of the model. The model depicts the utilization of oxygen, nitrate, iron oxide and arsenic as electron acceptors for oxidation of organic carbon (OC) in a column. The OC as electron donor is one of the most important factors that affect the iron and arsenic reduction bacterial activity.
UR - http://www.scopus.com/inward/record.url?scp=70350660667&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=70350660667&partnerID=8YFLogxK
U2 - 10.1007/s00254-008-1517-4
DO - 10.1007/s00254-008-1517-4
M3 - Article
AN - SCOPUS:70350660667
SN - 1866-6280
VL - 58
SP - 459
EP - 469
JO - Environmental Geology and Water Sciences
JF - Environmental Geology and Water Sciences
IS - 3
ER -